Densities and Viscosities of Chromium Trioxide + Potassium Chromate + Potassium Dichromate + Water from (298.15 to 333.15) K

Abstract

Densities and viscosities of chromium trioxide + potassium chromate + potassium dichromate + water quaternary mixtures and potassium chromate + potassium dichromate + water ternary mixtures have been measured from (298.15 to 333.15) K. The dependence of density and viscosity on temperature and concentration has been correlated. Apparent molar volumes, standard partial molar volumes, and the viscosity B-coefficient of chromium trioxide were calculated from the experimental measurements. The solute-mixed solvent interaction, solute-solute interaction, and structure-making effect of chromium trioxide have been discussed using the Helper equation and the Jones-Dole equation. The relationship between relative changes in viscosity and solute-mixed solvent interaction has been probed.

Density and Coefficients of Jones-dole Equation for Viscosity of Ternary Solutions Containing Sucrose/NaCl/KCl in Aqueous Glycine/Urea/Thiourea at 250C

“…Viscosities do not show satisfactorily linear dependence (for most of the cases R 2 < 0.988) on concentration of solute in each case. Viscosity was calculated from flow times and density of solution using standard relation [13][14] . Viscosity data has been analyzed by Jones-Dole, h r -1/√c=A + B × √c equation.…”

Density, Viscosity, and Refractive Index of Aqueous Solutions of Sodium Lactobionate

“…The density data can be employed to evaluate the apparent molar volumes of mixed solutions, which can explicate the interactions of solvent–solvent and solute–solvent. The apparent molar volumes ( V ϕ ) of sodium lactobionate in water are calculated by the following equation in which ρ 0 is the density of pure water in kg·m –3 and M is the molecular weight of sodium lactobionate. The evaluated apparent molar volumes of sodium lactobionate in water are presented in Table .…”

“…The relative changes in viscosity of sodium lactobionate in water (Δη) can be expressed as , where η 0 represents the viscosity of pure water. The evaluated values of Δη by eq based on the experimental data are presented in Table and plotted in Figure .…”

“…Relative Changes in Viscosity and Viscosity B Coefficient. The relative changes in viscosity of sodium lactobionate in water (Δη) can be expressed as 3,21…”

Measurement and correlation of densities and viscosities of 11α-hydroxy-16α,17α-epoxyprogesterone in chloroform

“…Because all flow times were greater than 200 s and the capillary diameter (0.38 mm) was far less than its length (120 mm), the kinetic energy and end corrections, respectively, were found to be negligible. The viscos ity was then calculated from the fundamental rela tionship [4]:…”